Wordnet 3.0
NOUN (1)
1. 
 an American operation in World War I (1918); 
 American troops under Pershing drove back the German armies which were saved only by the armistice on November 11; 
[syn: Meuse, Meuse River, Argonne, Argonne Forest, Meuse-Argonne, Meuse-Argonne operation]
WordNet (r) 3.0 (2006):
Argonne Forest
    n 1: an American operation in World War I (1918); American
         troops under Pershing drove back the German armies which
         were saved only by the armistice on November 11 [syn:
         Meuse, Meuse River, Argonne, Argonne Forest,
         Meuse-Argonne, Meuse-Argonne operation]